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Flow Setter 1.25" Male x 1.25" Male
20501S3

Flow Setter 1.25″ Male x 1.25″ Male

Lifetime Technical Support

Fast UK Delivery

Design Services Available

Trusted for over 20 years

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The Flow Setter 1.25″ Male x 1.25″ Male BSP is a high-capacity manual balancing valve designed to optimize hydraulic performance in larger heating and cooling systems. Engineered specifically for demanding applications like heat pumps, biomass systems, and large underfloor heating manifolds, this Flow Setter 1.25″ valve ensures precise fluid distribution across major pipework zones. Featuring an integrated mechanical flow indicator scale, the Flow Setter 1.25″ allows installers to read current flow rates instantly—completely eliminating the need for expensive external gauges or diagnostic charts. The built-in regulating ball valve enables effortless micro-adjustments on-site, ensuring your system operates at peak efficiency, eliminates cold spots, and reduces pump strain. With its robust brass construction and dual 1-1/4″ Male BSP connections, this Flow Setter 1.25″ valve delivers long-term reliability and can be flexibly installed in both horizontal and vertical orientations.

Key Features & Benefits

  • Instant Visual Monitoring: The Flow Setter 1.25″ offers direct, real-time flow rate readings at a glance without external tools.
  • Precise Balancing: Integrated regulating valve allows for immediate, exact flow calibration to match design specs.
  • Heavy-Duty Build: Solid brass body rated for PN10 pressure and operating temperatures up to 120°C.
  • Versatile Installation: Compact design can be mounted horizontally, vertically, or at an angle.
  • Maximum Efficiency: Balances larger systems to ensure even heat delivery and lower energy consumption.

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We want to make sure your order gets to you as quickly and smoothly as possible.

  • Next Day Delivery (England): £9.99

  • Next Day AM Delivery


Orders placed before 12:00 pm qualify for next working day delivery, with drop-offs generally scheduled between 8:00 am and 5:30 pm.

  • Pallet Delivery (Mainland UK): £72.00

    Required for heavier or bulkier items.

Important Cut-Off Times & Weekends Any orders placed after 12:00 pm on a Friday—along with orders made over the weekend—will be packed and dispatched on Monday for delivery on Tuesday. Please also keep in mind that bank holidays are classed as non-working days when calculating your delivery dates.

Need a Custom Option? If you need a specific timed delivery, have a non-mainland address, or require something outside our standard shipping options, get in touch with our team and we will do our best to help.

Please note: While we work closely with trusted couriers to ensure reliable, on-time arrivals, rare delays can occasionally happen. We always advise having your physical materials on-site before booking tradespeople to avoid any unexpected downtime or costs.

Get in Touch

If you have any questions about your delivery or need tracking assistance, our team is ready to help:

  • Email: sales@radiantcontrol.co.uk

  • Phone: 01530 519666

  • Opening Hours: Monday to Friday, 8:30 am – 4:30 pm

Trade Accounts

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We offer trade accounts with exclusive pricing on our range of products as well as a range of services.

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